Unit 6: Lathe Threading – Manufacturing Processes

Open navigation menu. Lathe tools grind 4.0 suggestions Search Search. User Settings. Skip carousel. Carousel Previous. Carousel Lxthe. What is Scribd? How to Grind Lathe Tools. Uploaded by charlie Document Information click to expand document information Date uploaded May 11, Did you find this document useful? Is this content inappropriate? Report this Document. Flag for inappropriate content. Download now. Related titles.

Carousel Previous Carousel Next. Cain Argus, WW. Jump to Page. Search inside document. A laghe of stesl being machined in the lathe with a correctly ground eS Cutter bit inserted in a lathe tool holder, Bulletin No. In order to machine metal accurately and. In this booklet the latest shop 40. for grinding various types of lathe tool cutter bits is outlined. The methods shown are used in our own shop, where we operate Back-Geared, Screw-Cutting Lathe tools grind 4.0 on all kinds of machine work.

All rights reserved. Lathe tool holder with How to Grind Lathe Tool Cutter Bits The cutter bit is that part of the lathe tool which cuts the metal that must be removed to bring the work to the desired size and shape.

The cutter bit is usually made of high speed steel, and held in a lathe tool holder as shown in Fig. High speed steel cutter bits are hardened and are ready for use when properly ground. In Fig. Correct grinding topls the lathe tool cutter bit is essential for good lathe work, because a properly ground cutter bit lathe tools grind 4.0 produce better results, last longer and cut more freely than one improperly ground.

The forged steel tool holder lathe tools grind 4.0 shown at the top of the page is made in three types, straight, right hand, and left hand, as shown at the right in Figs. These tool holders are also made in various sizes so they may be used in various size lathes. These different size tool holders also accommodate high speed steel cutter bits of the most practical size for the work they are lathe tools grind 4.0 to do.

It is advisable lathe tools grind 4.0 obtain- ing a tool holder to specify the size lathe on which it is to be used. Unground cutter lathe tools grind 4.0, Fig.

Cutter bit after grinding. Right hand tool holder. Yess Fig. See page 3. More complete information on grind- ing the cutter bits will be found on pages 5 to II. A sample set of cutter bits already ground to shape may be purchased and used as patterns, if desired.

This will be a big help to the beginner. I, Plate I, at left. The cutting edge is on the right side of the tool and the kathe of the tool slopes down away from the cutting edge. The right side and front of the tool are ground with sufficient clearance to permit the lathe tools grind 4.0 edge to advance when the feed is engaged without the heel of the tool rubbing against the work.

B—Round Nosed Turning Tool—This lathd is for general all around machine work and is used for taking light roughing cuts and finishing cuts. Usually, the top of the cutter bit is ground so that the tool may be fed from right to left although sometimes this cutter lathe tools grind 4.0 is ground flat on top so that the tool may be fed in either direction.

See Fig. The grin edge is on the left side. This is an ideal tool for taking roughing cuts and for general all around machine work. The direction of feed should be away from the lathe center. The cutting edge is on the right hand side of the tool and the point of the lathe tools grind 4.0 is sharp to permit machining a square corner. Usually, the top of the tool is ground flat and there is clearance on both sides of the tool so that it will cut on both sides.

Both sides of tool must have sufficient clearance to prevent binding and should be ground slightly narrower at the back than at the cutting edge. This tool is convenient for machining necks and grooves, squaring corners, etc. Lathe tools grind 4.0 may also be used for cutting off. A bench grinder able for grinding lathe tool cutter bits. Equipment for Grinding and Sharpening Lathe Tool Cutter Bits Good grinding equipment is essential for satisfactory grinding of lathe tool cutter bits.

The illustration above shows an excellent type toools grinder for this class of work. The grinder is motor driven and has two grinding wheels, one for rough grinding and the other for finish grinding the cutter bits. The wheels are 7 inches in diameter and have inch face. A grain vitrified wheel is used for rough grinding and a grain wheel for finishing grinding.

The peripheral speed of topls grinding wheel is approximately feet per minute. The grinding wheels grinx enclosed in close fitting guards, and the tool rest is convenient for some classes of grinding. The operator should wear goggles while grinding cutter bits if the grinder does not have glass spark shields. The grinding wheels should be balanced so that they will run smoothly, and the wheel must be dressed frequently to keep it true.

A Huntington type emery wheel dresser is usually used, although a fair job of wheel truing can be done with a broken piece of an old grinding wheel.

The toola pot at the left of the grinder should be filled with water in which the cutter bit may be cooled when it becomes heated from grinding. Cutter bits may be mounted in a special holder Fig. This makes it easy to hold short lengths. Tool holders should not be used for grinding cutter bits because they may be accidentally damaged by the grinding wheel.

In addition to the grinder, a good oil stone is necessary. After grinding, the cutting edge of the cutter bit should always be honed with an oil stone, as shown in Fig. I to 15, inclusive, show each step in the grinding of a round nosed turning tool for gen- eral machine work, The various steps in grinding the cutter bit tooos as follows: Fig.

Use a coarse grinding wheel to remove lathe tools grind 4.0 of the metal, and then finish on the side lahte the fine grinding wheel to produce Grinder For Sharpening Lathe Tools Zoom a straight surface.

If ground on the periphery of a small diameter wheel the cutting edge will Grinding Lathe Tools Youtube Videos be undercut and will not have the correct angle. Dip the cutter bit into water frequently while grinding to prevent overheating. This angle is not important as it has very little to do with the cutting edge of the tool, except too much of the bit should not be removed, as the more metal left on the bit the better it absorbs the heat.

A small radius approximately 14" is preferable as a large radius may cause chatter. Hold the cutter lathe tools grind 4.0 lightly against the side of the wheel and turn lathe tools grind 4.0 side to side to pro- duce the desired radius.

Be careful to hold the cutter bit at the correct angle to obtain the proper front clearance, as shown in Fig. Hone the cutting edge all around and on top with an oil stone, as shown in Fig.

Be careful not tols get the tool too hot—dip tool in cold water occasionally to avoid burning. The position of the cutter bit must be taken into considera- tion when grinding the various angles, as the height of the cutter bit determines the amount of front clearance necessary to permit free cutting.

Taper Turning, Thread Cutting, Brass Turning The cutting edge of the cutter bit should always be placed exactly on cen- ter, as shown in Fig. For Cast Iron, Steel, etc. For example, lathe tools grind 4.0 turning soft steel a rather acute angle should be used, but for machining hard steel or cast iron the cutting edge must lathe tools grind 4.0 well supported and Lathe Tools Grind Zip therefore the angle is less acute. This lathe tools grind 4.0 the angle of the cutter bit as shown in Fig.

Back Rake—The back rake is ground on the top of the cutter bit to facilitate free cutting. Correct side clearance and fide raice of cutter bit.

Side Rake—The side rake is ground on the top of the cutter bit to facilitate free cutting. Tool Angle—The tool angle or angle of keenness is the included angle of the cutting tool which is formed by the top and side of the cutter bit. Checking side clearance of cutter bit.

A cutter bit grinding gage as shown in Fig. This gage can easily be made of sheet metal, using Fig. Checking tool angle of cutter bit- Fig. Checking front clearance of cutter bit. This tool will cut freely but does not produce a very smooth finish.

When-using this type of tool it is advisable to leave sufficient stock for a finishing cut with the round nosed tool shown at the lathe tools grind 4.0 of the page.

end cijt angle side cut angle - side rake angle side relief tool back rake angle tool end relief eleva side view tool end. Oct 06,  · In part 1 of this three-part series on grinding HSS lathe tools Barry Young of Bates Technical College in Tacoma WA walks us through the process of grinding. The essence of lathe tool grinding, as I think of it, is to undercut the tip of the tool to provide 'relief' so that the metal just below the cutting tip does not contact the work. This concentrates enough cutting force on the tip to cut into the metal of the workpiece.

Free Woodworking Apps Belt And Disc Sander Bunnings Miter Clamps Harbor Freight 8th